## Measurement unit: km/h

**Full name:** kilometre/hour

**Plural form:** kilometers/hour

**Symbol:** km/h

**Alternate spelling:** km/hr

**Category type:** speed

**Scale factor:** 0.27777777777778

## SI unit: meter/second

The SI derived unit for speed is the meter/second.

1 meter/second is equal to 3.6 km/h.

Valid units must be of the **speed** type.

You can use this form to select from known units:

## Definition: Kilometer/hour

The kilometre per hour (American English: kilometer per hour) is a unit of both speed (scalar) and velocity (vector).

The km/h is the worldwide most commonly used speed unit on road signs and car speedometers.

## Sample conversions: km/h